If the Rubik's cube is too easy for you, check out this puzzle created by Jason Smith of PuzzleForge, based on Andrew Cormier's design. Behold, the Petaminx, a dodecahedral puzzle with 4 slices per face:

It is entirely custom built and contains almost 1000 moving parts.

This project took place over two months, including:

20 hours on masters and molds.
12 hours casting parts.
30 hours cleaning up parts and sanding (!!)
7 hours assembling all 1000 parts
6 hours stickering.

Also checkout the video clip of Andrew Cormier's Teraminx - via Unique Daily